March, 2015
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Measuring Three Levels of Process Control Continued from previous page
DeltaProbe system provides process control and intelligence matching manufacturers’ more intricate and detailed production requirements, without the need to use fragile test boards for daily oven checks. DeltaProbe uses SolderStar’s
unique “smart link interface.” This is part of an “intelligent” test fixture that can hold products to be tested and process recipe information for efficient thermal profile capture and data capture. The intelligent inter- face provides the secondary function of serving as a quick connection sys- tem that helps eliminate any chances of channel mix-up errors. DeltaProbe includes specially designed measure- ment sensors to capture thermal data without a test card or wires interfering with the procedure. The design approach results in a robust solution capable of delivering accu- rate, repeatable thermal results, as needed by many of today’s regulatory requirements. Such an oven verification tool
makes it possible to measure a “gold- en” process profile and to establish tolerance limits based on tempera- ture traces and process parameters. This ensures that measurements will be accurate and any changes in oven performance can be detected and flagged for remedial action. It also helps to make periodic testing of an oven more repeatable, convenient, and user-friendly, resulting in better process documentation at a lower cost to the manufacturer. Advanced thermal profiling sys-
tems like the DeltaProbe system offer many advantages compared to test card measurement methods: l
tenance during normal use, making it difficult to achieve repeatable measurement results with this approach, and false readings can occur. l
Test cards require constant main-
statistical process control (SPC) data collection for more accurate measurement and analysis. l
DeltaProbe system reveal any per- formance problems across the width of an oven heater under test. l
The matched sensors of the
independent limit settings for each oven zone, for more control in criti- cal applications. l
The DeltaProbe system enables with
with the DeltaProbe system, includ- ing those related to speed, conveyer and recipe loading, and program editing. l
ture a benchmark reading for a number of product lines, which is essential for high-volume production thermal monitoring.
The DeltaProbe system can cap- These benefits provide a true
picture of a manufacturing process’s capabilities, leading to higher-quali- ty soldering within an end product. Monitoring platforms such as this can be used once a temperature pro- file has been captured from a test PCB. By using that profile as a refer- ence, ongoing profile monitoring is performed by comparing subsequent measurements to the reference. Software used for this purpose includes advanced SPC tools to cre- ate charts for ongoing process-control measurements, trend evaluations, and development of corrective actions.
Many errors can be detected easily
XQuik with AccuCount Technology combines VJ Electronix’ X-ray imaging with AccuAssembly’s image processing and inventory management to provide a highly accurate count of components stored in tape-and-reel.
FEATURES:
Automatically “counts” components as small as 01005 One button operation Substantially speed up part counting process
No need to remove reel from antistatic moisture barrier bag for counting
Bohemia, NY Suzhou, China
VJ Electronix, Inc. 234 Taylor Street,
Littleton, Massachusetts USA 01460 “Because Performance Matters!”
See us at NEPCON China – booth B-1D10 See at NEPCON China, Booth B-1D10
7” through 15” reels Integrated barcode printing >99% part count accuracy May also be used for electronics inspection
VJ TECHNOLOGIES OFFICES Paris, France
Budapest, Hungary Bengaluru, India
www.vjelectronix.com Email:
electronixsales@vjt.com Tel: +1 631 589 8800 Fax: +1 978 486 4550
AccuCount The DeltaProbe system allows for
Continuous Oven Monitoring Development of profiling sys-
tems for monitoring of electronic products on a manufacturing line has helped to improve the reliability and
those that can record and provide traceability information of the process conditions with a manufac- turing oven for every electronic prod- uct passing through that oven. For this reason, SolderStar developed its Automatic Profiling System (APS). The system measures the stabil-
This oven verification fixture helps monitor the accuracy of the APS thermal measurements.
value of those electronic products. The pinnacle of such systems are
ity of different parameters within a thermal process, along with assembly position tracking, to produce detailed profiles for every PCB passing through the APS. It can continuously track PCB movements and locations through the system and monitor process fluctuations at the product or assembly level. These fluctuations are used as part of a mathematical model to calculate a particular PCB profile or “Virtual profile” for a product. The process parameters can then be calcu- lated and tested within limits. The APS uses a novel technique
Page 73
to reduce the number of thermocou- ple conductors required for product- level measurements, resulting in smaller required probe diameter. As an example, for a 14-zone machine, a probe diameter of 6mm might be used. This enables faster probe de - sign to detect machine faults quickly, for quick repair, saving time and money. Faults that can be detected on APS platforms include checking if zone temperatures and speeds are set properly according to a defined refer- ence, and rapid feedback on thermo- couple and conveyor and fan failures. Oven temperatures are monitored to ensure that they have been pro- grammed correctly and that no over- loading occurs for the oven. The SolderStar APS can contin-
uously compare each new set of measurements with the reference
Continued on page 80
KEEPING TRACK OF COMPONENT INVENTORY JUST GOT A LOT EASIER
Technology
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